Quick wins for a faster PC:
Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →Clear out junk files and repair common Windows errorsFree Scan →Scan for outdated or missing drivers - takes under a minuteDriver Scan →A 2011 study showed that a homogeneous iridium catalyst could couple methanol directly with allenes to make higher alcohols containing all-carbon quaternary centres. The authors called the transformation hydrohydroxymethylation and reported that it formed no stoichiometric by-products—a specific reaction-level result, not proof that the process is waste-free or ready for industrial use.
What the catalyst does
Methanol supplies a one-carbon building block, while an allene—a molecule with two adjacent carbon–carbon double bonds—acts as the coupling partner. Using a homogeneous iridium catalyst developed in their laboratory, Joseph Moran, Angelika Preetz, Ryan A. Mesch and co-authors reported that the reactants combine to produce higher alcohols with all-carbon quaternary centres. They described the result as the first catalytic C–C coupling of methanol that provides discrete hydrohydroxymethylation products.
As an Amazon Associate I earn from qualifying purchases.
The primary paper’s abstract states: “Using a homogeneous iridium catalyst developed in our laboratory, methanol engages in a direct C–C coupling with allenes to furnish higher alcohols that incorporate all-carbon quaternary centres, free of stoichiometric by-products.” The paper appeared in Nature Chemistry in 2011. Read the paper’s abstract and citation.
What “free of stoichiometric by-products” means
The phrase describes the reported reaction outcome: the coupling does not generate stoichiometric by-products. It does not establish that every part of a process built around the reaction would avoid waste. Solvent use, catalyst production, purification, upstream reagent manufacture and waste handling still matter when assessing a complete process.
#1 Best Overall
For context, a 2011 review by John F. Bower and Michael J. Krische discusses iridium-catalysed hydrogenation and transfer-hydrogenation methods that form C–C bonds while avoiding stoichiometric organometallic reagents and their metallic by-products. That broader field context is not evidence that every method is waste-free or commercially adopted. Read the review.
How the authors explain the reaction
Moran and colleagues report that methanol oxidation is turnover-limiting: it is the slow step that limits the overall catalytic cycle. They connect this finding to the high energetic demand of methanol dehydrogenation and say competition kinetics support their mechanistic interpretation. This is the authors’ explanation for this reaction, not a universal rule for all methanol-coupling chemistry.
Rank #2
Why the paper mentions methanol’s scale
The 2011 paper’s abstract gives methanol production as 35 million metric tons per year. That is the figure the authors stated in 2011 to convey the feedstock’s scale; it should not be read as a current production estimate.
What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
What the result does—and does not—establish
- Established in the report: a homogeneous iridium catalyst enables direct C–C coupling between methanol and allenes to form higher alcohols containing all-carbon quaternary centres.
- Reported by the authors: no stoichiometric by-products form, and competition kinetics support their proposed mechanism involving turnover-limiting methanol oxidation.
- Not established by the available paper abstract: industrial scalability, commercial adoption, present-day catalyst availability, lifecycle environmental performance, or whether the method is safer or cheaper than alternatives.
The article was published online on 27 February 2011. PubMed’s record independently lists the paper and reproduces its abstract. Chemistry World’s headline-level framing appeared that same day, but the technical details above come from the primary paper.
Quick Recap
Best Value
Rank #4
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
